Guide to Liverworts of Oregon: Key to Riccia 1
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1a plants thallose > 2b chloroplasts numerous > 62b thallus tissue complex > 70b terrestrial > 72a epidermal cells uniform > Riccia
Riccia fluitans Frye & Clark 1937, p. 37.
1a Aquatic; lobes thin; widespread but uncommon in Willamette Valley.
Riccia fluitans
Riccia sorocarpa. Spencer Butte, Lane Co., Oregon. DHW m1358.
1b Terrestrial; lobes stout.
(COUPLET 2)